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Thread: Dohc swap. Wanna confirm

  1. #1

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    07-12-2017
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    4
    Location

    Iowa
    Vehicle

    1991 Dodge D-50
    Engine

    4G64

    Dohc swap. Wanna confirm

    So im getting ready to start getting the parts for my dohc swap so i just wanted to make a thread with the list i think i needto make sure i got everything correct. So far i got:
    G63t 6 bolt head with intake(modded for rwd), fuel rail, etc
    Sensors, ecu, and harnefrom 1g dsm
    4G64 dohc cam gears
    G63 headgasket

    Then the typical water routing stuff with a full 63 swap. Am i missing anything?0911171908a.jpg

  2. #2

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    11-29-2015
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    454
    Location

    miami, fl
    Vehicle

    1991 Dodge D-50
    Engine

    4G64
    Am i missing anything?
    ummm.... the wealth of info already posted, especially in the 'sticky' topics
    no idea exactly what flavour dohc u tryin to build either. 63, 64, turbo ?

  3. #3

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    06-15-2014
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    6,059
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    Adelaide, South Australia
    Vehicle

    1985 Mitsubishi L200
    Engine

    G63B
    Another member has asked about improving the HP from their 4G64 so I added this link as a starter -

    http://projectzerog.com/sohc-dohc.shtml

    It is laid out in a straight forward manner and gets right down to what you need to know.

  4. #4

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    08-06-2013
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    Location

    Ronkonkoma
    Vehicle

    1991 Mitsubishi Mighty Max
    Engine

    4G64
    I can't find anywhere where it says the pistons need to be changed when doing a dohc swap on 7bolt 8 valve 4g64 mighty max engine, but I'm 99% sure the valve relief pattern is for three and not 4 valves per cylinder. Can someone confirm the pistons don't need to be changed in a 1995 mighty max?

  5. #5


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    03-21-2011
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    Location

    WA
    Vehicle

    1989 Mitsubishi Mighty Max
    Engine

    4G63-T
    I'm thinking you might experience contact. I would just change the Pistons, an out-of-round measurement on the cylinder walls would make me sleep better at night if it was my engine. An out of round might be the tie breaker in either direction.

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